277 static int sca3000_write_reg(struct sca3000_state *st, u8 address, u8 val)  in sca3000_write_reg()  argument
279 	st->tx[0] = SCA3000_WRITE_REG(address);  in sca3000_write_reg()
280 	st->tx[1] = val;  in sca3000_write_reg()
281 	return spi_write(st->us, st->tx, 2);  in sca3000_write_reg()
284 static int sca3000_read_data_short(struct sca3000_state *st,  in sca3000_read_data_short()  argument
291 			.tx_buf = st->tx,  in sca3000_read_data_short()
294 			.rx_buf = st->rx,  in sca3000_read_data_short()
297 	st->tx[0] = SCA3000_READ_REG(reg_address_high);  in sca3000_read_data_short()
299 	return spi_sync_transfer(st->us, xfer, ARRAY_SIZE(xfer));  in sca3000_read_data_short()
304  * @st: Driver specific device instance data.
308 static int sca3000_reg_lock_on(struct sca3000_state *st)  in sca3000_reg_lock_on()  argument
312 	ret = sca3000_read_data_short(st, SCA3000_REG_STATUS_ADDR, 1);  in sca3000_reg_lock_on()
316 	return !(st->rx[0] & SCA3000_LOCKED);  in sca3000_reg_lock_on()
321  * @st: Driver specific device instance data.
327 static int __sca3000_unlock_reg_lock(struct sca3000_state *st)  in __sca3000_unlock_reg_lock()  argument
333 			.tx_buf = st->tx,  in __sca3000_unlock_reg_lock()
337 			.tx_buf = st->tx + 2,  in __sca3000_unlock_reg_lock()
340 			.tx_buf = st->tx + 4,  in __sca3000_unlock_reg_lock()
343 	st->tx[0] = SCA3000_WRITE_REG(SCA3000_REG_UNLOCK_ADDR);  in __sca3000_unlock_reg_lock()
344 	st->tx[1] = 0x00;  in __sca3000_unlock_reg_lock()
345 	st->tx[2] = SCA3000_WRITE_REG(SCA3000_REG_UNLOCK_ADDR);  in __sca3000_unlock_reg_lock()
346 	st->tx[3] = 0x50;  in __sca3000_unlock_reg_lock()
347 	st->tx[4] = SCA3000_WRITE_REG(SCA3000_REG_UNLOCK_ADDR);  in __sca3000_unlock_reg_lock()
348 	st->tx[5] = 0xA0;  in __sca3000_unlock_reg_lock()
350 	return spi_sync_transfer(st->us, xfer, ARRAY_SIZE(xfer));  in __sca3000_unlock_reg_lock()
355  * @st: Driver specific device instance data.
364 static int sca3000_write_ctrl_reg(struct sca3000_state *st,  in sca3000_write_ctrl_reg()  argument
370 	ret = sca3000_reg_lock_on(st);  in sca3000_write_ctrl_reg()
374 		ret = __sca3000_unlock_reg_lock(st);  in sca3000_write_ctrl_reg()
380 	ret = sca3000_write_reg(st, SCA3000_REG_CTRL_SEL_ADDR, sel);  in sca3000_write_ctrl_reg()
385 	return sca3000_write_reg(st, SCA3000_REG_CTRL_DATA_ADDR, val);  in sca3000_write_ctrl_reg()
390  * @st: Driver specific device instance data.
395 static int sca3000_read_ctrl_reg(struct sca3000_state *st,  in sca3000_read_ctrl_reg()  argument
400 	ret = sca3000_reg_lock_on(st);  in sca3000_read_ctrl_reg()
404 		ret = __sca3000_unlock_reg_lock(st);  in sca3000_read_ctrl_reg()
409 	ret = sca3000_write_reg(st, SCA3000_REG_CTRL_SEL_ADDR, ctrl_reg);  in sca3000_read_ctrl_reg()
412 	ret = sca3000_read_data_short(st, SCA3000_REG_CTRL_DATA_ADDR, 1);  in sca3000_read_ctrl_reg()
415 	return st->rx[0];  in sca3000_read_ctrl_reg()
427 	struct sca3000_state *st = iio_priv(indio_dev);  in sca3000_print_rev()  local
429 	mutex_lock(&st->lock);  in sca3000_print_rev()
430 	ret = sca3000_read_data_short(st, SCA3000_REG_REVID_ADDR, 1);  in sca3000_print_rev()
435 		 st->rx[0] & SCA3000_REG_REVID_MAJOR_MASK,  in sca3000_print_rev()
436 		 st->rx[0] & SCA3000_REG_REVID_MINOR_MASK);  in sca3000_print_rev()
438 	mutex_unlock(&st->lock);  in sca3000_print_rev()
449 	struct sca3000_state *st = iio_priv(indio_dev);  in sca3000_show_available_3db_freqs()  local
452 	len = sprintf(buf, "%d", st->info->measurement_mode_3db_freq);  in sca3000_show_available_3db_freqs()
453 	if (st->info->option_mode_1)  in sca3000_show_available_3db_freqs()
455 			       st->info->option_mode_1_3db_freq);  in sca3000_show_available_3db_freqs()
456 	if (st->info->option_mode_2)  in sca3000_show_available_3db_freqs()
458 			       st->info->option_mode_2_3db_freq);  in sca3000_show_available_3db_freqs()
561  * @st: Private driver specific device instance specific state.
567 static inline int __sca3000_get_base_freq(struct sca3000_state *st,  in __sca3000_get_base_freq()  argument
573 	ret = sca3000_read_data_short(st, SCA3000_REG_MODE_ADDR, 1);  in __sca3000_get_base_freq()
577 	switch (SCA3000_REG_MODE_MODE_MASK & st->rx[0]) {  in __sca3000_get_base_freq()
595  * @st: Private driver specific device instance specific state.
600 static int sca3000_read_raw_samp_freq(struct sca3000_state *st, int *val)  in sca3000_read_raw_samp_freq()  argument
604 	ret = __sca3000_get_base_freq(st, st->info, val);  in sca3000_read_raw_samp_freq()
608 	ret = sca3000_read_ctrl_reg(st, SCA3000_REG_CTRL_SEL_OUT_CTRL);  in sca3000_read_raw_samp_freq()
629  * @st: Private driver specific device instance specific state.
634 static int sca3000_write_raw_samp_freq(struct sca3000_state *st, int val)  in sca3000_write_raw_samp_freq()  argument
638 	ret = __sca3000_get_base_freq(st, st->info, &base_freq);  in sca3000_write_raw_samp_freq()
642 	ret = sca3000_read_ctrl_reg(st, SCA3000_REG_CTRL_SEL_OUT_CTRL);  in sca3000_write_raw_samp_freq()
655 	return sca3000_write_ctrl_reg(st, SCA3000_REG_CTRL_SEL_OUT_CTRL,  in sca3000_write_raw_samp_freq()
659 static int sca3000_read_3db_freq(struct sca3000_state *st, int *val)  in sca3000_read_3db_freq()  argument
663 	ret = sca3000_read_data_short(st, SCA3000_REG_MODE_ADDR, 1);  in sca3000_read_3db_freq()
668 	st->rx[0] &= SCA3000_REG_MODE_MODE_MASK;  in sca3000_read_3db_freq()
669 	switch (st->rx[0]) {  in sca3000_read_3db_freq()
671 		*val = st->info->measurement_mode_3db_freq;  in sca3000_read_3db_freq()
676 		*val = st->info->option_mode_1_3db_freq;  in sca3000_read_3db_freq()
679 		*val = st->info->option_mode_2_3db_freq;  in sca3000_read_3db_freq()
686 static int sca3000_write_3db_freq(struct sca3000_state *st, int val)  in sca3000_write_3db_freq()  argument
691 	if (val == st->info->measurement_mode_3db_freq)  in sca3000_write_3db_freq()
693 	else if (st->info->option_mode_1 &&  in sca3000_write_3db_freq()
694 		 (val == st->info->option_mode_1_3db_freq))  in sca3000_write_3db_freq()
696 	else if (st->info->option_mode_2 &&  in sca3000_write_3db_freq()
697 		 (val == st->info->option_mode_2_3db_freq))  in sca3000_write_3db_freq()
701 	ret = sca3000_read_data_short(st, SCA3000_REG_MODE_ADDR, 1);  in sca3000_write_3db_freq()
705 	st->rx[0] &= ~SCA3000_REG_MODE_MODE_MASK;  in sca3000_write_3db_freq()
706 	st->rx[0] |= (mode & SCA3000_REG_MODE_MODE_MASK);  in sca3000_write_3db_freq()
708 	return sca3000_write_reg(st, SCA3000_REG_MODE_ADDR, st->rx[0]);  in sca3000_write_3db_freq()
717 	struct sca3000_state *st = iio_priv(indio_dev);  in sca3000_read_raw()  local
723 		mutex_lock(&st->lock);  in sca3000_read_raw()
725 			if (st->mo_det_use_count) {  in sca3000_read_raw()
726 				mutex_unlock(&st->lock);  in sca3000_read_raw()
730 			ret = sca3000_read_data_short(st, address, 2);  in sca3000_read_raw()
732 				mutex_unlock(&st->lock);  in sca3000_read_raw()
735 			*val = sign_extend32(be16_to_cpup((__be16 *)st->rx) >>  in sca3000_read_raw()
740 			ret = sca3000_read_data_short(st,  in sca3000_read_raw()
744 				mutex_unlock(&st->lock);  in sca3000_read_raw()
747 			*val = (be16_to_cpup((__be16 *)st->rx) >>  in sca3000_read_raw()
751 		mutex_unlock(&st->lock);  in sca3000_read_raw()
756 			*val2 = st->info->scale;  in sca3000_read_raw()
765 		mutex_lock(&st->lock);  in sca3000_read_raw()
766 		ret = sca3000_read_raw_samp_freq(st, val);  in sca3000_read_raw()
767 		mutex_unlock(&st->lock);  in sca3000_read_raw()
770 		mutex_lock(&st->lock);  in sca3000_read_raw()
771 		ret = sca3000_read_3db_freq(st, val);  in sca3000_read_raw()
772 		mutex_unlock(&st->lock);  in sca3000_read_raw()
783 	struct sca3000_state *st = iio_priv(indio_dev);  in sca3000_write_raw()  local
790 		mutex_lock(&st->lock);  in sca3000_write_raw()
791 		ret = sca3000_write_raw_samp_freq(st, val);  in sca3000_write_raw()
792 		mutex_unlock(&st->lock);  in sca3000_write_raw()
797 		mutex_lock(&st->lock);  in sca3000_write_raw()
798 		ret = sca3000_write_3db_freq(st, val);  in sca3000_write_raw()
799 		mutex_unlock(&st->lock);  in sca3000_write_raw()
824 	struct sca3000_state *st = iio_priv(indio_dev);  in sca3000_read_av_freq()  local
827 	mutex_lock(&st->lock);  in sca3000_read_av_freq()
828 	ret = sca3000_read_data_short(st, SCA3000_REG_MODE_ADDR, 1);  in sca3000_read_av_freq()
829 	val = st->rx[0];  in sca3000_read_av_freq()
830 	mutex_unlock(&st->lock);  in sca3000_read_av_freq()
837 			       st->info->measurement_mode_freq,  in sca3000_read_av_freq()
838 			       st->info->measurement_mode_freq / 2,  in sca3000_read_av_freq()
839 			       st->info->measurement_mode_freq / 4);  in sca3000_read_av_freq()
843 			       st->info->option_mode_1_freq,  in sca3000_read_av_freq()
844 			       st->info->option_mode_1_freq / 2,  in sca3000_read_av_freq()
845 			       st->info->option_mode_1_freq / 4);  in sca3000_read_av_freq()
849 			       st->info->option_mode_2_freq,  in sca3000_read_av_freq()
850 			       st->info->option_mode_2_freq / 2,  in sca3000_read_av_freq()
851 			       st->info->option_mode_2_freq / 4);  in sca3000_read_av_freq()
873 	struct sca3000_state *st = iio_priv(indio_dev);  in sca3000_read_event_value()  local
879 		mutex_lock(&st->lock);  in sca3000_read_event_value()
880 		ret = sca3000_read_ctrl_reg(st,  in sca3000_read_event_value()
882 		mutex_unlock(&st->lock);  in sca3000_read_event_value()
888 					 ARRAY_SIZE(st->info->mot_det_mult_y))  in sca3000_read_event_value()
889 				*val += st->info->mot_det_mult_y[i];  in sca3000_read_event_value()
892 					 ARRAY_SIZE(st->info->mot_det_mult_xz))  in sca3000_read_event_value()
893 				*val += st->info->mot_det_mult_xz[i];  in sca3000_read_event_value()
925 	struct sca3000_state *st = iio_priv(indio_dev);  in sca3000_write_event_value()  local
931 		i = ARRAY_SIZE(st->info->mot_det_mult_y);  in sca3000_write_event_value()
933 			if (val >= st->info->mot_det_mult_y[--i]) {  in sca3000_write_event_value()
935 				val -= st->info->mot_det_mult_y[i];  in sca3000_write_event_value()
938 		i = ARRAY_SIZE(st->info->mot_det_mult_xz);  in sca3000_write_event_value()
940 			if (val >= st->info->mot_det_mult_xz[--i]) {  in sca3000_write_event_value()
942 				val -= st->info->mot_det_mult_xz[i];  in sca3000_write_event_value()
946 	mutex_lock(&st->lock);  in sca3000_write_event_value()
947 	ret = sca3000_write_ctrl_reg(st,  in sca3000_write_event_value()
950 	mutex_unlock(&st->lock);  in sca3000_write_event_value()
965 static int sca3000_read_data(struct sca3000_state *st,  in sca3000_read_data()  argument
974 			.tx_buf = st->tx,  in sca3000_read_data()
981 	st->tx[0] = SCA3000_READ_REG(reg_address_high);  in sca3000_read_data()
982 	ret = spi_sync_transfer(st->us, xfer, ARRAY_SIZE(xfer));  in sca3000_read_data()
984 		dev_err(&st->us->dev, "problem reading register\n");  in sca3000_read_data()
998 	struct sca3000_state *st = iio_priv(indio_dev);  in sca3000_ring_int_process()  local
1001 	mutex_lock(&st->lock);  in sca3000_ring_int_process()
1004 		ret = sca3000_read_data_short(st, SCA3000_REG_BUF_COUNT_ADDR,  in sca3000_ring_int_process()
1008 		num_available = st->rx[0];  in sca3000_ring_int_process()
1013 		ret = sca3000_read_data(st, SCA3000_REG_RING_OUT_ADDR, st->rx,  in sca3000_ring_int_process()
1025 			iio_push_to_buffers(indio_dev, st->rx + i * 3 * 2);  in sca3000_ring_int_process()
1029 	mutex_unlock(&st->lock);  in sca3000_ring_int_process()
1047 	struct sca3000_state *st = iio_priv(indio_dev);  in sca3000_event_handler()  local
1055 	mutex_lock(&st->lock);  in sca3000_event_handler()
1056 	ret = sca3000_read_data_short(st, SCA3000_REG_INT_STATUS_ADDR, 1);  in sca3000_event_handler()
1057 	val = st->rx[0];  in sca3000_event_handler()
1058 	mutex_unlock(&st->lock);  in sca3000_event_handler()
1112 	struct sca3000_state *st = iio_priv(indio_dev);  in sca3000_read_event_config()  local
1115 	mutex_lock(&st->lock);  in sca3000_read_event_config()
1117 	ret = sca3000_read_data_short(st, SCA3000_REG_MODE_ADDR, 1);  in sca3000_read_event_config()
1123 		ret = !!(st->rx[0] & SCA3000_REG_MODE_FREE_FALL_DETECT);  in sca3000_read_event_config()
1132 		if ((st->rx[0] & SCA3000_REG_MODE_MODE_MASK)  in sca3000_read_event_config()
1136 			ret = sca3000_read_ctrl_reg(st,  in sca3000_read_event_config()
1149 	mutex_unlock(&st->lock);  in sca3000_read_event_config()
1156 	struct sca3000_state *st = iio_priv(indio_dev);  in sca3000_freefall_set_state()  local
1160 	ret = sca3000_read_data_short(st, SCA3000_REG_MODE_ADDR, 1);  in sca3000_freefall_set_state()
1165 	if (state && !(st->rx[0] & SCA3000_REG_MODE_FREE_FALL_DETECT))  in sca3000_freefall_set_state()
1166 		return sca3000_write_reg(st, SCA3000_REG_MODE_ADDR,  in sca3000_freefall_set_state()
1167 					 st->rx[0] | SCA3000_REG_MODE_FREE_FALL_DETECT);  in sca3000_freefall_set_state()
1169 	else if (!state && (st->rx[0] & SCA3000_REG_MODE_FREE_FALL_DETECT))  in sca3000_freefall_set_state()
1170 		return sca3000_write_reg(st, SCA3000_REG_MODE_ADDR,  in sca3000_freefall_set_state()
1171 					 st->rx[0] & ~SCA3000_REG_MODE_FREE_FALL_DETECT);  in sca3000_freefall_set_state()
1179 	struct sca3000_state *st = iio_priv(indio_dev);  in sca3000_motion_detect_set_state()  local
1186 	ret = sca3000_read_ctrl_reg(st, SCA3000_REG_CTRL_SEL_MD_CTRL);  in sca3000_motion_detect_set_state()
1192 		ret = sca3000_write_ctrl_reg(st,  in sca3000_motion_detect_set_state()
1198 		st->mo_det_use_count++;  in sca3000_motion_detect_set_state()
1200 		ret = sca3000_write_ctrl_reg(st,  in sca3000_motion_detect_set_state()
1206 		st->mo_det_use_count--;  in sca3000_motion_detect_set_state()
1210 	ret = sca3000_read_data_short(st, SCA3000_REG_MODE_ADDR, 1);  in sca3000_motion_detect_set_state()
1214 	if ((st->mo_det_use_count) &&  in sca3000_motion_detect_set_state()
1215 	    ((st->rx[0] & SCA3000_REG_MODE_MODE_MASK)  in sca3000_motion_detect_set_state()
1217 		return sca3000_write_reg(st, SCA3000_REG_MODE_ADDR,  in sca3000_motion_detect_set_state()
1218 			(st->rx[0] & ~SCA3000_REG_MODE_MODE_MASK)  in sca3000_motion_detect_set_state()
1221 	else if (!(st->mo_det_use_count) &&  in sca3000_motion_detect_set_state()
1222 		 ((st->rx[0] & SCA3000_REG_MODE_MODE_MASK)  in sca3000_motion_detect_set_state()
1224 		return sca3000_write_reg(st, SCA3000_REG_MODE_ADDR,  in sca3000_motion_detect_set_state()
1225 			st->rx[0] & SCA3000_REG_MODE_MODE_MASK);  in sca3000_motion_detect_set_state()
1251 	struct sca3000_state *st = iio_priv(indio_dev);  in sca3000_write_event_config()  local
1254 	mutex_lock(&st->lock);  in sca3000_write_event_config()
1271 	mutex_unlock(&st->lock);  in sca3000_write_event_config()
1279 	struct sca3000_state *st = iio_priv(indio_dev);  in __sca3000_hw_ring_state_set()  local
1282 	mutex_lock(&st->lock);  in __sca3000_hw_ring_state_set()
1283 	ret = sca3000_read_data_short(st, SCA3000_REG_MODE_ADDR, 1);  in __sca3000_hw_ring_state_set()
1288 		ret = sca3000_write_reg(st,  in __sca3000_hw_ring_state_set()
1290 			(st->rx[0] | SCA3000_REG_MODE_RING_BUF_ENABLE));  in __sca3000_hw_ring_state_set()
1292 		ret = sca3000_write_reg(st,  in __sca3000_hw_ring_state_set()
1294 			(st->rx[0] & ~SCA3000_REG_MODE_RING_BUF_ENABLE));  in __sca3000_hw_ring_state_set()
1296 	mutex_unlock(&st->lock);  in __sca3000_hw_ring_state_set()
1313 	struct sca3000_state *st = iio_priv(indio_dev);  in sca3000_hw_ring_preenable()  local
1315 	mutex_lock(&st->lock);  in sca3000_hw_ring_preenable()
1318 	ret = sca3000_read_data_short(st, SCA3000_REG_INT_MASK_ADDR, 1);  in sca3000_hw_ring_preenable()
1321 	ret = sca3000_write_reg(st,  in sca3000_hw_ring_preenable()
1323 				st->rx[0] | SCA3000_REG_INT_MASK_RING_HALF);  in sca3000_hw_ring_preenable()
1327 	mutex_unlock(&st->lock);  in sca3000_hw_ring_preenable()
1332 	mutex_unlock(&st->lock);  in sca3000_hw_ring_preenable()
1340 	struct sca3000_state *st = iio_priv(indio_dev);  in sca3000_hw_ring_postdisable()  local
1347 	mutex_lock(&st->lock);  in sca3000_hw_ring_postdisable()
1349 	ret = sca3000_read_data_short(st, SCA3000_REG_INT_MASK_ADDR, 1);  in sca3000_hw_ring_postdisable()
1352 	ret = sca3000_write_reg(st,  in sca3000_hw_ring_postdisable()
1354 				st->rx[0] & ~SCA3000_REG_INT_MASK_RING_HALF);  in sca3000_hw_ring_postdisable()
1356 	mutex_unlock(&st->lock);  in sca3000_hw_ring_postdisable()
1367  * @st: Device instance specific private data structure
1373 static int sca3000_clean_setup(struct sca3000_state *st)  in sca3000_clean_setup()  argument
1377 	mutex_lock(&st->lock);  in sca3000_clean_setup()
1379 	ret = sca3000_read_data_short(st, SCA3000_REG_INT_STATUS_ADDR, 1);  in sca3000_clean_setup()
1384 	ret = sca3000_read_ctrl_reg(st, SCA3000_REG_CTRL_SEL_MD_CTRL);  in sca3000_clean_setup()
1387 	ret = sca3000_write_ctrl_reg(st, SCA3000_REG_CTRL_SEL_MD_CTRL,  in sca3000_clean_setup()
1393 	ret = sca3000_read_ctrl_reg(st, SCA3000_REG_CTRL_SEL_OUT_CTRL);  in sca3000_clean_setup()
1396 	ret = sca3000_write_ctrl_reg(st, SCA3000_REG_CTRL_SEL_OUT_CTRL,  in sca3000_clean_setup()
1405 	ret = sca3000_read_data_short(st, SCA3000_REG_INT_MASK_ADDR, 1);  in sca3000_clean_setup()
1408 	ret = sca3000_write_reg(st,  in sca3000_clean_setup()
1419 	ret = sca3000_read_data_short(st, SCA3000_REG_MODE_ADDR, 1);  in sca3000_clean_setup()
1422 	ret = sca3000_write_reg(st, SCA3000_REG_MODE_ADDR,  in sca3000_clean_setup()
1423 				(st->rx[0] & SCA3000_MODE_PROT_MASK));  in sca3000_clean_setup()
1426 	mutex_unlock(&st->lock);  in sca3000_clean_setup()
1443 	struct sca3000_state *st;  in sca3000_probe()  local
1446 	indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*st));  in sca3000_probe()
1450 	st = iio_priv(indio_dev);  in sca3000_probe()
1452 	st->us = spi;  in sca3000_probe()
1453 	mutex_init(&st->lock);  in sca3000_probe()
1454 	st->info = &sca3000_spi_chip_info_tbl[spi_get_device_id(spi)  in sca3000_probe()
1459 	if (st->info->temp_output) {  in sca3000_probe()
1484 	ret = sca3000_clean_setup(st);  in sca3000_probe()
1501 static int sca3000_stop_all_interrupts(struct sca3000_state *st)  in sca3000_stop_all_interrupts()  argument
1505 	mutex_lock(&st->lock);  in sca3000_stop_all_interrupts()
1506 	ret = sca3000_read_data_short(st, SCA3000_REG_INT_MASK_ADDR, 1);  in sca3000_stop_all_interrupts()
1509 	ret = sca3000_write_reg(st, SCA3000_REG_INT_MASK_ADDR,  in sca3000_stop_all_interrupts()
1510 				(st->rx[0] &  in sca3000_stop_all_interrupts()
1515 	mutex_unlock(&st->lock);  in sca3000_stop_all_interrupts()
1522 	struct sca3000_state *st = iio_priv(indio_dev);  in sca3000_remove()  local
1527 	sca3000_stop_all_interrupts(st);  in sca3000_remove()